Punch and shearing machine.



a. SEARS.

- PUNCH AND SHEARING MACHINE.

APPLICATION FILED MAR. 22. 1915.

1 1 85,838 Patented June 6, 1916.

2 SHEETS-SHEET l- Inventor Witnesses .7? W Attorneys G. SEARS.

PUNCH AND SHEARING MACHINE.

APPLICATION FILED MAR. 22, m5.

1 ,1 85,838 Patented June 6,1916.

2 SHEETS-SHEET 2- v Attorneys "UNITED STATES PATENT oEEIoE.

GEORGE SEARS, 0F ONSLOW, IOWA.

PUNCH AND SHEAR ING MACHINE.

Application filed March 22, 1915.

To all whom it may concern Be it known that I, GEORGE SEARs, a citizenof the United States, residing at Onslow, in the county of Jones andState of Iowa, have invented a new and useful Punch and ShearingMachine, of which the following is a specification.

The device forming the subject matter of this'application is adapted tobe employed for cutting sheets of metal, for severing round bars and forpunching purposes.

The invention aims to provide novel means for actuating the movable jaw,to improve the punch and stripper mechanism and, generally, to improveand to enhance the utility of devices of that type to which the presentinvention appertains.

With the above and other objects in view which will appear as thedescription proceeds, the invention resides in the combina tion andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that there is provided asupporting structure in cluding a standard 1 upstanding from a base 2.On the upper end of the standard 1 there is formed an arcuate rack 3.Projecting from the standard 1 relatively near to the base 2 is a fixedarm 4. A fixed jaw 5 also projects from the standard 1. A blade 6 issecured to the jaw 5 by means of attaching elements 7. The arm 4 carriesan anvil 8 adapted to coiiperate with a punch to be describedhereinafter. Projecting laterally from the arm 4 is a lug 9 throughwhich passes an eye bolt 10 provided atits lower end with a nut 11coacting with the lug. Held at one end by the eye bolt 10 and at itsother end mounted in a lug 14 on the standard 1 is a transverse pivotelement 12.

Mounted to swing on the pivot element 12 is a movable jaw 15 providedwith an upstanding arm 16. A blade 17 is attached to the jaw 15 by meansof securing elements 18 and is adapted to coact with the blade 6Specification of Letters Patent.

Serial No. 16,224.

for cutting strips or sheets of metal. On one side of the movable jaw 15is formed a lug 20 receiving and holding one end of a loopshapeddepending arm 19, the other end of which is free, and the arm beingresilient. The function of the arm 19 is to hold a strip or sheet ofmetal down on the edge of the fixed blade 6 while the sheet or strip isbeing cut by the blade 17 on the movable jaw 15, the arm 19 of courseyielding during such an operation.

A stripper in the, form of a block 21 is detachably seated in the jaw 5and is held thereto by resilient clips 22 which are attached to the jaw5 by means of securing elements 23. In the stripper 21 reciprocates withnecessary freedom a punch 24 adapted to coact with the anvil 8. Theupper end of the punch 24 is received in a lug 25 formed on the sideface of the'movable jaw 15, the upper end of the punch being consuch amanner that the punch will operate properly when the jaw 15 isdepressed. The punch 24 coacts with the anvil 8 in forming a hole in thestrip or sheet of metal and an obvious function of the stripper 21 is toper mit a withdrawal of the punch from the strip or sheet of metal whenthe jaw 15 and the punch are elevated. In the movable jaw 15 there isformed a hole 27 adapted to move into and out of registration with ahole 28 formed in the standard 1. The holes 27 and 28 constitute a meansfor shearing off bars of metal when the. jaw '15 is rocked on itsfulcrum 12. v

A link 29 is pivotally connected to the rear, upper end of the arm 16 ofthe movable jaw 15 and in the upper end of the link 29 is journaled ashaft having squared portions 30. Upon one of the squared portions 30 ofthe shaft is held a pinion 31 adapted to mesh into the rack 3. Heads 32are mounted on the squared portions 30 of the shaft and the headscomprise a plurality of arms 33 having sockets 34, in any one of whichmay be inserted an operating lever (notshown). 7

When a lever is inserted into one of the arms 33, the shaft will berotated, the pinion 31 being rotated also and traversing the arcuaterack 3. As the shaft is rotated, and as, the pinion moves forwardlyalong the Patented June 6,1916. I

and having its forward end attached to the movable jaw, the arm beinglocated to one side of the movable jaw and being adapted to coact withthe material operated upon by the jaws to hold the material on the fixedjaw, the inner end of the arm being free; and means for operating themovable jaw.

2. In a device of the class described, a supporting structure providedwith an outstanding fixed jaw and provided with an ofiset lug locatedbelow the fixed jaw; an eye bolt mounted in the lug; a nut on the eyebolt and coacting with the lug; a pivot element mounted in the eye boltand in the supporting structure; a movable jaw adapted to coact with thefixed jaw and supported on the pivot element; means for operating themovable jaw; and a loop-shaped arm secured at its outer end to themovable jaw, the arm being resilient and being extended below themovable jaw, the inner end of the arm being free and being upwardly andrearwardly extended to clear the upper end of the eye bolt and the pivotelement.

3. In a device of the class described, a supporting structure providedwith an outstanding fixed jaw and provided with an outstanding armlocated below the fixed j aw; an anvil carried by the arm; a stripper onthe fixed jaw; a punch slidable in the stripper and adapted to coactwiththe anvil; a movable jaw adapted to coact with the fixed jaw andpivoted to the supporting structure; means for operating the movablejaw; a resilient, depending arm attached at its outer end to the movablejaw' and located to one side of the movable jaw, the resilient armcoacting with the material engaged by the jaws, to hold down thematerial on the fixed jaw, and toaid in elevating the movable jaw, andto aid in retracting the punch in the stripper, when the jaws and thepunch are used simultaneously; and means for pivotally connecting thepunch to the movable jaw.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

. GEORGE SEARS.

WVitnesses:

HIRAM H. ROBERTS, J osnrn ORR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of ZPatents,

Washington, D. G.

